var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var cors = require('cors')
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users').router;
const fs = require('fs');
var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(cors())
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

var server = require('http').Server(app);
var WebSocket = require('ws');
var WebSocketServer = WebSocket.Server;
var wss = new WebSocketServer({port: 3001});
wss.on('open',function open() {
  console.log('open');
})
wss.on('connection', function connection(ws) {
  ws.on('message', function incoming(message) {
    console.log('received: %s', message);
    message = message.toString('utf8');
    let msg = message.split('_')[1]
    let user  = message.split('_')[0]
    // 广播消息给所有客户端
    wss.clients.forEach(function each(client) {
      if (client.readyState === WebSocket.OPEN) {
        let userData = fs.readFileSync('./data/userData.json', 'utf8');
        let data = {
          time: new Date().toLocaleString(),
          user:user,
          message: msg,
          userList:JSON.parse(userData)
        };
        data = JSON.stringify(data);
        client.send(data,{binary:false});
      }
    });
  });
})

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
